This week's batch of fitness motivation photos focuses on the humble dumbbell — the training equipment of choice for sexy ladies staring pensively off into the distance. Check out the photos below for our 21 favorite examples of girls using …

As I predicted, Tuesday's “Sexy Women Flipping Tires” gallery — as dumb as it was — wound up generating way more pageviews than anything else we posted this week, which means that these Fitness Motivation photo galleries are here to …